221093090 has 16 divisors (see below), whose sum is σ = 399409272. Its totient is φ = 88116864.

The previous prime is 221093083. The next prime is 221093107. The reversal of 221093090 is 90390122.

It can be written as a sum of positive squares in 4 ways, for example, as 80694289 + 140398801 = 8983^2 + 11849^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37139 + ... + 42678.

Almost surely, 2^221093090 is an apocalyptic number.

221093090 is a deficient number, since it is larger than the sum of its proper divisors (178316182).

221093090 is a wasteful number, since it uses less digits than its factorization.

221093090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80101.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 221093090 is about 14869.1993732010. The cubic root of 221093090 is about 604.6792371102.

The spelling of 221093090 in words is "two hundred twenty-one million, ninety-three thousand, ninety".